Developers create paths for users to tread. Some users will stay on the beaten track; others will diverge and take risky shortcuts. If user-preferred and developer-created paths diverge too much, it is time for the developer to consider a new path. A case in point is the humble password. They fill an important developer need: a cheap and easy mechanism to control access and enforce accountabili...

3D Sensing with MEMS Accurately sensing location in 3D currently requires large, expensive devices. Researchers in MIT’s Department of Aeronautics and Astronautics have devised an approach to microelectromechanical systems (MEMS) fabrication that lets engineers design 3D configurations for existing fabrication processes. They used the approach successfully to build a MEMS device that enables 3D...

Gonorrhea is a relatively common infection among men who have sex with men, but it is becoming more common in heterosexual people. It is caused by the bactera Neisseria gonorrhoeae . This infection is transmitted via unprotected anal, oral and vaginal sex and can quickly be treated with antibiotics, but, if left untreated, gonorrhea can lead to serious problems. Such problems can occur because ...

City shrinkage is one of the thorny problems that many European cities have to face with nowadays. It is mainly expressed as the decrease of population in these cities. Eastern Germany is one of the pioneers of European shrinking cities with long shrinking history. The paper selects one representative shrinking city Halle (Saale) in eastern Germany as research objective, collecting and investig...

Shrinking pleuritis with atelectasis is a disease in which a compression atelectasis of the lung is caused by shrinking of the inflamed visceral pleura. This reaction has been attributed to asbestos. By means of scanning electron microscopy, with computerised x ray spectrophotometry and x ray diffraction analysis, tissue samples from the lymph nodes of patients with the disease and control subj...

In this paper, the problem of unsteady stagnationpoint flow and heat transfer induced by a shrinking sheet in the presence of radiation effect is studied. The transformed boundary layer equations are solved numerically by the shooting method. The influence of radiation, unsteadiness and shrinking parameters, and the Prandtl number on the reduced skin friction coefficient and the heat transfer c...

The present paper describes the analytical solutions for the steady boundary layer flow of a Jeffrey fluid over a shrinking sheet. The governing equations of motions are reduced into a set of nonlinear ordinary differential equations by using similarity transformations. Two types of problems, namely, (1) two-dimensional stagnation flow towards a shrinking sheet and (2) axisymmetric stagnation f...

The unsteady stagnation point flow and heat transfer over a stretching/shrinking sheet with suction/injection is studied. The governing partial differential equations are converted into nonlinear ordinary differential equations using a similarity transformation and solved numerically. Both stretching and shrinking cases are considered. Results for the skin friction coefficient, local Nusselt nu...